The NodeEvaluation makes it difficult to use a course node in the
learning path access concept. So it is refactored to a minimum extent,
so that it can covering the previous functionality.
As a replacement a new security callback and a new tree node type is
introduced.

Rearrange the different settings in the same place with a segment view
for all resources. Implement a new flag for resources "bookable" which
indicates the entries with a booking methods. Guests users doesn't have
a right to view courses with booking methods.

To retrieve the min. score, max. score and the cut value, double check
if the resource is really based on QtiWorks otherwise fallback to the
old configuration. Fix an issue in statistics where the max. score and
cut value are retrieve from the wrong place. Cache the min. score and
max. score in the results list of the course assessed identities to
prevent reloading the values for every user.

status, all users, guests flags

organization, implement segment view for user visit card to better
inline in user management, implements several features for all roles
(allow enrollment, mandatory confirmation email by enrollment, allow
autocomplete, bulk changes...), add roles like lecture manager, quality
manager..., enhance the roles editor in user management

OO-3296: don't upgrade manager roles if administrator and decouple every role, remove double update roles method...

OO-3296: implement migration tool from institution resource manager to learn resource manager based on organizations

OO-3297: refactor the user management to use organization for managing the roles instead of named security groups